NXP Semiconductors MC68EN360VR33L

Overview

MC68EN360VR33L from Freescale Semiconductor is a 32-bit integrated communications microcontroller featuring the CPU32+ core, System Integration Module (SIM60), and Communications Processor Module (CPM). It delivers 4.5 MIPS at 25 MHz, supports up to 32-bit data bus width, includes four SCCs (with Ethernet/IEEE 802.3 optional on SCC1), two SMCs, one SPI, and dual TDM channel support - deployed in industrial gateways and telecom edge routers requiring deterministic serial protocol handling.

For engineers reviewing the MC68EN360VR33L datasheet, MC68EN360VR33L pinout, MC68EN360VR33L application, or MC68EN360VR33L equivalent, key selection criteria include its quad-SCC architecture with HDLC/SDLC up to 2 Mbps per channel, slave mode compatibility with MC68040-family processors, and integrated DRAM controller enabling glueless system design with EPROM, SRAM, and DRAM SIMMs.

Technical Context

The MC68EN360VR33L implements a three-module architecture: CPU32+ core (M68000 instruction set compatible, 4.5 MIPS @ 25 MHz), SIM60 (32-bit IMB interface, DRAM controller, IEEE 1149.1 JTAG, periodic timer, software watchdog), and CPM (RISC-based communications engine with 224 buffer descriptors, seven serial channels, and time-slot assigner for TDM).

It supports dynamic bus sizing (8/16/32-bit peripherals), slave mode operation for use as an intelligent peripheral alongside external CPUs, and MC68040 companion mode with burst-mode DRAM control. The device integrates four general-purpose timers (configurable as four 16-bit or two 32-bit units) and two independent DMAs supporting 32-bit internal/external transfers with buffer chaining.

Key Specifications

Pinout & Package

MC68EN360VR33L is housed in a 240-pin Plastic Quad Flat Pack (PQFP) with 20-mil pitch, rated for –40°C to +85°C operation. Pin functions are multiplexed across system bus, serial I/O, timer, DMA, and debug interfaces.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar integrated communications controller applications.

Compared with MC68EN360VR33L, MC68360RC25 removes Ethernet capability but retains identical serial protocol support and pin-compatible PQFP footprint, whereas MPC860T offers higher performance and integrated FEC but demands complete software rearchitecture and PCB redesign.

Availability

MC68EN360VR33L is available at Aetrix Electronics and suitable for industrial protocol gateways, telecom edge routers, legacy serial terminal servers, and secure remote management nodes requiring stable component supply across extended product lifecycles.

Supply support for MC68EN360VR33L includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Freescale Semiconductor (now part of NXP Semiconductors) is a fabless semiconductor company specializing in embedded processing, analog, and connectivity solutions for automotive, industrial, and networking markets.

The MC68EN360VR33L belongs to the QUICC™ family - designed specifically for deterministic, multi-protocol serial communications in resource-constrained embedded systems where CPU offload and hardware-accelerated packet handling are critical.

FAQ

What is the operating temperature range for the MC68EN360VR33L?

The MC68EN360VR33L is rated for industrial operation from –40°C to +85°C. This extended temperature range ensures reliable performance in outdoor telecom enclosures, factory-floor controllers, and vehicle-mounted communication modules where ambient conditions exceed commercial-grade limits. The device's fully static design allows it to maintain functionality at zero clock frequency during thermal stress events.

Does the MC68EN360VR33L support Ethernet MAC functionality?

Yes, the MC68EN360VR33L supports IEEE 802.3 10-Mbps Ethernet MAC layer functionality exclusively on SCC1 - a feature distinguishing the "EN" variant from standard MC68360 parts. This capability requires an external Ethernet transceiver (e.g., MC68160) and uses the CPM's buffer descriptor engine to handle frame assembly, CRC generation, and collision detection without CPU32+ intervention.

How does the MC68EN360VR33L differ from the MC68360EM25?

The MC68EN360VR33L includes Ethernet capability on SCC1 and is specified for –40°C to +85°C operation, whereas the MC68360EM25 lacks Ethernet support and is rated only for 0°C to 70°C. Both share identical CPU32+, SIM60, and CPM architectures, but MC68EN360VR33L's "EN" designation confirms hardware-enabling of the Ethernet MAC function and extended temperature qualification - verified in Freescale's official package/frequency table.

Can the MC68EN360VR33L operate as a peripheral to an external CPU?

Yes, the MC68EN360VR33L supports slave mode operation, allowing its CPU32+ core to be disabled while the SIM60 and CPM remain fully functional under control of an external bus master. In MC68040 companion mode, it interfaces directly with MC68EC040 or MC68040 processors, managing DRAM, interrupts, and serial I/O - effectively serving as a programmable communications co-processor for high-performance host systems.

What memory types does the MC68EN360VR33L support natively?

The MC68EN360VR33L natively supports SRAM, EPROM, Flash EPROM, and DRAM via its integrated memory controller. It provides four chip select outputs (CS0–CS3), four write enable lines (WE0–WE3), one output enable (OE), and dedicated RAS/CAS signals for DRAM SIMMs. Boot configuration allows selection of 8-, 16-, or 32-bit memory width on CS0, enabling mixed-width memory subsystems without external logic.